Searched for: author%3A%22de+Vrijer%2C+T.%22
(1 - 13 of 13)
document
de Vrijer, T. (author)
In this dissertation, a framework is presented for the development of high voltage multijunction photovoltaic (PV) devices. Specifically, wireless silicon-based monolithically integrated 2-terminal multijuction PV devices are investigated. Such devices can be used in autonomous solar-to-fuel synthesis systems, as well as other innovative...
doctoral thesis 2022
document
de Vrijer, T. (author), van Nijen, D.A. (author), Parasramka, Harsh (author), Procel Moya, P.A. (author), Zhao, Y. (author), Isabella, O. (author), Smets, A.H.M. (author)
Two terminal multi-junction (MJ) photovoltaic (PV) devices are well established concepts to increase the solar-to-electrical power conversion in reference to single PV junctions. In multi-junction PV devices two consecutive sub-cells are interconnected using a tunnel recombination junction (TRJ) in which the light excited holes of one sub...
journal article 2022
document
de Vrijer, T. (author), Bouazzata, Bilal (author), Smets, A.H.M. (author)
Semiconductors based on group IV elements are widely used in the fields of micro-electronics, optics and photonics. The group IV alloys are processed using plasma enhanced chemical vapor deposition and its opto-electrical properties are a result of the material composition and structure. Infrared and Raman spectroscopy are complementary and...
journal article 2022
document
de Vrijer, T. (author), Miedema, Sander (author), Blackstone, Thijs (author), van Nijen, D.A. (author), Han, C. (author), Smets, A.H.M. (author)
A logical next step for achieving a cost price reduction per Watt peak of photovoltaics (PV) is multijunction PV devices. In two-terminal multijunction PV devices, the photo-current generated in each subcell should be matched. Intermediate reflective layers (IRLs) are widely employed in multijunction devices to increase reflection at the...
journal article 2022
document
de Vrijer, T. (author), Smets, A.H.M. (author)
In this abstract an overview is presented of research performed in the DISCO project, on the development of a silicon-based high voltage multijunction device for autonomous solar to fuel applications.'
conference paper 2022
document
de Vrijer, T. (author), van Dingen, Julian E.C. (author), Roelandschap, Paul J. (author), Roodenburg, Koos (author), Smets, A.H.M. (author)
Amorphous and nano-crystalline germanium is of potential interest for a wide range of electronic, optical, opto-electronic and photovoltaic applications. In this work the influence of deposition temperature on hydrogenated germanium (Ge:H) films was characterized, using over 200 Ge:H and over 70 SiGe:H films. The demonstrated temperature...
journal article 2022
document
de Vrijer, T. (author), Roodenburg, Koos (author), Saitta, F.S. (author), Blackstone, Thijs (author), Limodio, G. (author), Smets, A.H.M. (author)
An alloy based on the group IV elements germanium and tin has the potential of yielding an earth-abundant low bandgap energy semiconductor material with applications in the fields of micro-electronics, optics, photonics and photovoltaics. In this work, the first steps towards the plasma enhanced chemical vapour deposition (PECVD) processing of a...
journal article 2022
document
de Vrijer, T. (author), Bouazzata, Bilal (author), Ravichandran, Ashwath (author), van Dingen, Julian E.C. (author), Roelandschap, Paul J. (author), Roodenburg, Koos (author), Roerink, Steven J. (author), Saitta, F.S. (author), Blackstone, Thijs (author), Smets, A.H.M. (author)
In this paper the opto-electrical nature of hydrogenated group IV alloys with optical bandgap energies ranging from 1.0 eV up to 2.3 eV are studied. The fundamental physical principles that determine the relation between the bandgap and the structural characteristics such as material density, elemental composition, void fraction and...
journal article 2022
document
de Vrijer, T. (author), Smets, A.H.M. (author)
The oxidation and carbisation kinetics of porous amorphous and nano-crystalline hydrogenated germanium (a-Ge:H and nc-Ge:H) films exposed to ambient air and deionized water have been studied using vibration modes observed by infrared spectroscopy. Based on infrared analysis, a two-step process of first oxidation by water and secondly carbisation...
journal article 2022
document
de Vrijer, T. (author), Wiering, M. (author), van Nijen, D.A. (author), Padmakumar, G. (author), Sambamurthy, S. (author), Limodio, G. (author), Smets, A.H.M. (author)
Surface textures that result in high optical yields are crucial for high efficiency photovoltaic (PV) devices. In this work three different texturing approaches are presented that result in smooth concave structures devoid of sharp features. Such features can sustain the crack-free growth of device quality nano- to poly-crystalline materials...
journal article 2022
document
de Vrijer, T. (author), Smets, A.H.M. (author)
Doped layers are a determining factor for the performance of photovoltaic devices such as silicon heterojunction and thin film silicon solar cells. The material properties of doped hydrogenated amorphous/nanocrystalline silicon-oxide (a/nc-SiO X≥0 :H) films processed by plasma-enhanced chemical vapor deposition generally exhibit a tradeoff...
journal article 2021
document
de Vrijer, T. (author), Smets, A.H.M. (author)
Crystalline silicon tandem devices with perovskites, CIGS, and nanocrystalline silicon, as well as the TOPCon design, are incompatible with the conventional pyramidal surface texture of silicon. This is a result of crack formation in nano to polycrystalline growth on large sharp surface features. In this work, three texturing approaches are...
journal article 2021
document
de Vrijer, T. (author), Ravichandran, Ashwath (author), Bouazzata, Bilal (author), Smets, A.H.M. (author)
Low-cost multijunction photovoltaic devices are the next step in the solar energy revolution. Adding a bottom junction with a low bandgap energy material through plasma enhanced chemical vapor deposition (PECVD) processing could potentially provide a low-cost boost in conversion efficiency. A logical candidate for this low bandgap material is...
journal article 2021
Searched for: author%3A%22de+Vrijer%2C+T.%22
(1 - 13 of 13)